Your network contains a Microsoft System Center 2012 Virtual Machine Manager (VMM) server named Server1.
You use Server1 to manage 20 Hyper-V hosts.
The network also contains five Citrix XenServer visualization hosts

You need to recommend which installation is required to manage the XenServer servers from Server1.
What should you recommend installing?

A.
The Citrix XenServer -Microsoft System Center Integration Pack on Server1

B.
Citrix Essentials for Hyper-V on Server1

C.
Citrix Essentials for Hyper-V on the Citrix XenServer hosts

D.
The Citrix XenServer -Microsoft System Center Integration Pack on the Citrix XenServer hosts

Explanation:
SCCM VMM can be used to managed Virtual Machines from other vendors like VMWare and Citrix. To enable VMM to manage Xenserver Hosts, you simply install
the Microsoft System Center Integration pack on the Xenserver Hosts.
https://www.citrix.com/blogs/2011/06/16/managing-xenserver-with-system-center-virtual-machine-manager-scvmm-2012/